It is true and correct, but that does not mean it can directly work with every file format from every 360 camera. I read that .insv is an unstitched Insta360 video file. While Shotcut can open these (you open it like any other video, which means drag-n-drop or File > Open), our 360 filters do not provide stitching. They work with already stitched video. You usually need to usethe camera maker’s software to stitch and export it in a standard projection, but sometimes there is alternative software. Most of our filters support only equirectangular projection except there is also a way to convert double-fisheye: